Basalog One is a long-acting insulin glargine injection primarily used to improve glycemic control (blood sugar levels) in adults and children with Diabetes Mellitus. Primary Medical Uses • Type 1 Diabetes Mellitus: It provides the necessary background (basal) insulin that individuals with Type 1 diabetes lack because their pancreas produces little to no insulin. It is typically paired with short-acting (bolus) insulin taken at mealtimes. • Type 2 Diabetes Mellitus: It is used when oral diabetes medications or other injectable therapies are not sufficient to keep blood sugar levels within a target range.